Stock-Based Compensation (Narrative) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended			0 Months Ended	12 Months Ended			0 Months Ended	12 Months Ended			12 Months Ended		0 Months Ended	12 Months Ended
	Dec. 30, 2011 Years	Dec. 31, 2010	Jan. 01, 2010	Nov. 02, 2011 Restricted Stock Units (RSUs) [Member]	Dec. 30, 2011 Restricted Stock Units (RSUs) [Member] Years	Dec. 30, 2011 Restricted Stock [Member]	Dec. 31, 2010 Restricted Stock [Member]	Dec. 09, 2011 Dividend Equivalent Units (DEUs) [Member]	Dec. 30, 2011 2011 Omnibus Share Incentive Plan [Member] Years	May 05, 2011 2011 Omnibus Share Incentive Plan [Member] Restricted Stock Units (RSUs) [Member]	Dec. 30, 2011 2011 Omnibus Share Incentive Plan [Member] Restricted Stock [Member]	Dec. 30, 2011 Share Incentive Plan 1999 [Member] Years	Dec. 30, 2011 Non Employee Directors Plan [Member]	Jan. 03, 2012 Non Employee Directors Plan [Member] Issuance of Equity [Member]	Dec. 30, 2011 Non Employee Directors Plan [Member] Restricted Stock [Member]	Dec. 31, 2010 Non Employee Directors Plan [Member] Restricted Stock [Member]	Dec. 30, 2011 Maximum [Member] Restricted Stock Units (RSUs) [Member]	Dec. 30, 2011 Maximum [Member] 2011 Omnibus Share Incentive Plan [Member] Years	Dec. 30, 2011 Maximum [Member] Share Incentive Plan 1999 [Member] Years	Dec. 30, 2011 Minimum [Member] Restricted Stock Units (RSUs) [Member]	Dec. 30, 2011 Stock Options [Member] 2011 Omnibus Share Incentive Plan [Member]	May 05, 2011 Stock Options [Member] 2011 Omnibus Share Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Plans, maximum number of ordinary shares that may be covered by awards										500,000			150,000									2,500,000
Share-Based Compensation Plans, maximum number of ordinary shares that may be granted to a single participant											344,382	115,000			89,191						1,580,000
Options, percent that vest immediately									20.00%			20.00%
Options, vest in equal installments (years)									4			4
Options, expiration period																		10	10
Excess Tax Benefit from Share-based Compensation, Operating Activities	$ 2.9	$ 0	$ 0
Proceeds from stock options exercised	22.8	2.2	1.0
Non-Employee Directors Equity Plan, Shares awarded				155,000				618						27,573	27,853	32,956
Period that assumptions for volatility are made	5 years
Percent of awards that vest on the date granted						50.00%
Awards will vest after recipient ceases to serve as a member															6 months
Stock-based compensation expense					0.2
Total intrinsic value of options exercised	8.2	0.8
Total fair value of options granted	9.3	1.2
Total fair value of options vested	7.7	7.3
Total fair value of options vested, weighted average fair value	$ 8.42	$ 7.65
Percent of award units granted, range																	100.00%			0.00%
Award units vesting period (years)					3 years
Total remaining unrecognized compensation cost related to non-vested stock options	$ 11.2				$ 3.4
Unrecognized compensation cost related to non-vested stock options amortized over weighted-average period	1.8				3
Price per share				$ 24.68		$ 25.14	$ 21.24	$ 25.13						$ 25.39
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number					155,618